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Diffstat (limited to 'gcell/ibm/sync/spu_source/cond_init.h')
| -rw-r--r-- | gcell/ibm/sync/spu_source/cond_init.h | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/gcell/ibm/sync/spu_source/cond_init.h b/gcell/ibm/sync/spu_source/cond_init.h deleted file mode 100644 index 7202e5352..000000000 --- a/gcell/ibm/sync/spu_source/cond_init.h +++ /dev/null @@ -1,127 +0,0 @@ -/* -------------------------------------------------------------- */ -/* (C)Copyright 2001,2007, */ -/* International Business Machines Corporation, */ -/* Sony Computer Entertainment, Incorporated, */ -/* Toshiba Corporation, */ -/* */ -/* All Rights Reserved. */ -/* */ -/* Redistribution and use in source and binary forms, with or */ -/* without modification, are permitted provided that the */ -/* following conditions are met: */ -/* */ -/* - Redistributions of source code must retain the above copyright*/ -/* notice, this list of conditions and the following disclaimer. */ -/* */ -/* - Redistributions in binary form must reproduce the above */ -/* copyright notice, this list of conditions and the following */ -/* disclaimer in the documentation and/or other materials */ -/* provided with the distribution. */ -/* */ -/* - Neither the name of IBM Corporation nor the names of its */ -/* contributors may be used to endorse or promote products */ -/* derived from this software without specific prior written */ -/* permission. */ -/* */ -/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND */ -/* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, */ -/* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */ -/* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */ -/* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR */ -/* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */ -/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT */ -/* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; */ -/* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) */ -/* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN */ -/* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR */ -/* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, */ -/* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -/* -------------------------------------------------------------- */ -/* PROLOG END TAG zYx */ -#ifndef _SPU_COND_INIT_H_ -#define _SPU_COND_INIT_H_ - -#include "sync_utils.h" -#include "cond.h" -#include <spu_mfcio.h> - - -/** - * cond_init - initialize condition variable. - * @cond: handle to effective address of condition variable. - * - * - * Conditional Variable - is a synchronization device that allows - * SPE and PPE threads to suspend execution and relinquish the - * processors until some predicate on shared data is satisfied. - * The basic operations on conditions are: signal the condition - * (when the predicate becomes true), and wait for the condition, - * suspending the thread execution until anoter thread signals the - * condition - * - * A condition variable must always be associated with a mutex, to - * avoid the race condition where a thread prepares to wait on a - * condition variable and another thread signals the condition just - * before the first thread actually waits on it. - * - * cond_init initializes the condition variable cond. - * - * cond_signal restarts one of the threads that are waiting on the - * condition variable cond. If no threads are waiting on cond, nothing - * happens. If several threads are waiting on cond, exactly one - * is restarted, but it is not specified which - * - * cond_broadcast restarts all the threads that are waiting on the - * condition variable cond. Nothing happens if no threads are waiting - * on cond - * - * cond_wait atomically unlocks the mutex and waits for the condition - * variable cond to be signaled. The mutex must be lock locked by - * the calling thread on the entrance to cond_wait. Before returning - * to the calling thread, cond_wait re-acquires mutex. - * - * Only one thread initializes a condition variable. Usually, the - * PPE thread initializes a condidtion variable, however, a cond_init - * function is provided here for completeness - * - * Description: Initialize a cond variable to false. - */ -static __inline void _cond_init(cond_ea_t cond ) -{ - char _tmp[256]; - char *tmp = (char *) ALIGN(_tmp, 128); - volatile unsigned short *buf = (volatile unsigned short *) &tmp[0]; - unsigned int size = 128, tagid; - unsigned int offset; - addr64 ea64; - unsigned int oldtmask; - unsigned int tagmask; - - tagid = mfc_tag_reserve(); - - tagmask = 1 << (tagid & 31); - - ea64.ull = ALIGN128_EA(cond); - offset = OFFSET128_EA_U16(cond); - - MFC_DMA(buf, ea64, size, tagid & 31, MFC_GET_CMD); - oldtmask = spu_readch(MFC_RdTagMask); - spu_writech(MFC_WrTagMask, tagmask); - spu_writech(MFC_WrTagUpdate, MFC_TAG_UPDATE_ANY); - spu_readch(MFC_RdTagStat); - - /* this is still just one word. since buf is of type - * short, we fit both counts into one word. */ - buf[offset] = 0; - buf[offset+1] = 0; - MFC_DMA(buf, ea64, size, (tagid & 31), MFC_PUT_CMD); - spu_writech(MFC_WrTagMask, tagmask); - spu_writech(MFC_WrTagUpdate, MFC_TAG_UPDATE_ANY); - spu_readch(MFC_RdTagStat); - spu_writech(MFC_WrTagMask, oldtmask); - mfc_tag_release (tagid); -} - - - -#endif /* _SPU_COND_INIT_H_ */ |